<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>参数列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <el-alert title="注意：只允许第三级分类设置相关参数!" type="warning" :closable="false"></el-alert>
      <!-- 选择商品分类区域 -->
      <el-row class="cat_opt">
        <el-col>
          <span>选择商品分类:</span>
          <!-- 选择商品分类的级联选择框 -->
          <el-cascader
            expand-trigger="hover"
            :options="catelist"
            :props="cateProps"
            v-model="selectedCateKeys"
            @change="handleChange"
          ></el-cascader>
        </el-col>
      </el-row>
      <!-- tab页签区域 -->
      <el-tabs v-model="activeName" @tab-click="handleTabClick">
        <!-- 添加动态参数的面板 -->
        <el-tab-pane label="动态参数" name="many">
          <el-button
            type="primary"
            size="mini"
            :disabled=" isBtnDisabled"
            @click="addDialogVisible=true"
          >添加参数</el-button>
          <!-- 动态参数表格 -->
          <el-table :data="manyTableData" border stripe>
            <!-- 展开行 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <!-- 循环渲染Tag标签 -->
                <el-tag v-for="(item,i) in scope.row.attr_vals" :key="i" closable
                @close="handleClose(i,scope.row)">{{item}}</el-tag>
               <!-- 输入框 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                ></el-input>
                <!-- 添加按钮 -->
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <!-- 索引行 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="参数名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  type="primary"
                  icon="el-icon-edit"
                  size="mini"
                  @click="showEddDialog(scope.row.attr_id)"
                >编辑</el-button>
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  size="mini"
                  @click="removeUserById(scope.row.attr_id)"
                >删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <!-- 添加静态属性的面板 -->
        <el-tab-pane label="静态属性" name="only">
          <el-button
            type="primary"
            size="mini"
            :disabled=" isBtnDisabled"
            @click="addDialogVisible=true"
          >添加属性</el-button>
          <!-- 静态属性表格 -->
          <el-table :data="onlyTableData" border stripe>
            <!-- 展开行 -->
               <el-table-column type="expand">
              <template slot-scope="scope">
                <!-- 循环渲染Tag标签 -->
                <el-tag v-for="(item,i) in scope.row.attr_vals" :key="i" closable
                @close="handleClose(i,scope.row)">{{item}}</el-tag>
               <!-- 输入框 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                ></el-input>
                <!-- 添加按钮 -->
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="属性名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  type="primary"
                  icon="el-icon-edit"
                  size="mini"
                  @click="showEddDialog(scope.row.attr_id)"
                >编辑</el-button>
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  size="mini"
                  @click="removeUserById(scope.row.attr_id)"
                >删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>
    <!-- 添加参数的对话框 -->
    <el-dialog
      :title="'添加'+ titleText"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <!-- 添加参数的对话框 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 编辑参数/属性的对话框 -->
    <el-dialog
      :title="'编辑' + titleText"
      :visible.sync="eddDialogVisible"
      width="50%"
      @close="eddDialogClosed"
    >
      <!-- 内容主体区域 -->
      <el-form :model="eddForm" :rules="eddFormRules" ref="eddFormRef" label-width="80px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="eddForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="eddDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="edduUserInfo">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>


<script>
import { async } from 'q'
export default {
  data() {
    return {
      //商品分类列表
      catelist: [],
      //级联选择框的配置对象
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      //级联选择框双向绑定到的数组
      selectedCateKeys: [],
      //被激活页签的名称
      activeName: 'many',
      //动态参数数据
      manyTableData: [],
      //静态属性数据
      onlyTableData: [],
      //控制添加对话框额度显示与隐藏
      addDialogVisible: false,
      //天骄参数得到表单数据对象
      addForm: {
        attr_name: ''
      },
      //添加表单的验证规则对象
      addFormRules: {
        attr_name: [
          { required: true, message: '请输入参数名称', trigger: 'blur' }
        ]
      },
      //控制编辑角色对话框的显示与隐藏
      eddDialogVisible: false,
      //查询到的角色信息对象
      eddForm: {
        attr_name: ''
      },
      //编辑表单的验证规则对象
      eddFormRules: {
        attr_name: [
          { required: true, message: '请输入参数名称', trigger: 'blur' }
        ]
      },
     
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    //获取所有的商品分类列表
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类列表失败')
      }
      this.catelist = res.data
      console.log(this.catelist)
    },
    //级联选择框选中项变化，会触发这个函数
    handleChange() {
      this.getParamsData()
    },
    //tab 页签点击事件的处理函数
    handleTabClick() {
      console.log(this.activeName)
      this.getParamsData()
    },
    //获取参数的列表数据
    async getParamsData() {
      //证明选中的不是三级分类
      if (this.selectedCateKeys.length !== 3) {
        this.selectedCateKeys = []
        this.manyTableData=[]
        this.onlyTableData=[]
        return
      }
      //证明选中的是三级分类
      console.log(this.selectedCateKeys)
      //根据所选分类的id，和当前所处的面板，获取对应的参数
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes`,
        {
          params: { sel: this.activeName }
        }
      )
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数列表失败！')
      }

      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        //控制文本框的显示与隐藏
        item.inputVisible=false
        //文本框输入的值
        item.inputValue=''
      })
      console.log(res.data, 44444)
      if (this.activeName === 'many') {
        this.manyTableData = res.data
      } else {
        this.onlyTableData = res.data
      }
    },
    //监听对话框的关闭事件
    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    //点击按钮，添加参数
    addParams() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post(
          `categories/${this.cateId}/attributes`,
          {
            attr_name: this.addForm.attr_name,
            attr_sel: this.activeName
          }
        )
        if (res.meta.status !== 201) {
          return this.$message.error('添加参数失败！')
        }
        this.$message.success('添加参数成功！')
        this.addDialogVisible = false
        this.getParamsData()
      })
    },
    //根据id删除对应的属性/参数信息
    async removeUserById(id) {
      //弹窗询问用户是否删除数据
      console.log(id, 222)

      const confirmResult = await this.$confirm(
        '此操作将永久删除该用户，是否继续？',
        '提示',
        { confirmButtonText: '确定', cancelButtonText: '取消', type: 'warning' }
      ).catch(err => err)
      //如果用户确认了删除，则返回值是字符串 confirm
      //如果用户取消了删除，则返回值为字符串 cancel
      console.log(confirmResult, 1111)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已经取消了删除')
      }

      const { data: res } = await this.$http.delete(
        `categories/${this.cateId}/attributes/${id}`
      )
      console.log(this.cateId, 999)
      if (res.meta.status !== 200) {
        return this.$message.error('删除用户失败！')
      }
      this.$message.success('删除用户成功！')
      this.getParamsData()
    },
    //展示编辑用户的对话框
    async showEddDialog(id) {
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes/${id}`,
        {
          attr_name:row.attr_name,
          attr_sel:row.attr_sel,
          attr_vals:row.attr_vals.join('')
        }
      )
      if(res.meta.status!=200){
        return this.$message.error('修改参数失败')
      }
      this.$message.success('修改参数成功！')
      if (res.meta.status !== 200) {
        return this.$message.error('查询信息失败')
      }
      console.log(res, 7777)

      this.eddForm = res.data
      console.log(this.eddForm, 888)

      this.eddDialogVisible = true
    },
    //监听编辑用户对话框的关闭事件
    eddDialogClosed() {
      this.$refs.eddFormRef.resetFields()
    },
    //编辑用户信息并提交
    edduUserInfo() {
      this.$refs.eddFormRef.validate(async valid => {
        // console.log(valid);
        if (!valid) return
        //发起编辑用户信息的数据请求
        // console.log(this.eddForm, 77777)

        const { data: res } = await this.$http.put(
          `categories/${this.cateId}/attributes/${this.eddForm.attr_id}`,
          {
            attr_name: this.eddForm.attr_name,
            attr_sel: this.activeName
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('更新信息失败！')
        }

        // 关闭对话框
        this.eddDialogVisible = false
        // 刷新数据列表
        this.getParamsData()
        // 提示编辑成功
        this.$message.success('更新信息成功！')
      })
     
    },
     //文本框失去焦点，或摁下Enter都会触发
      async handleInputConfirm(row){
        if(row.inputValue.trim().length===0){
          row.inputValue=''
          row.inputVisible=false  
           return
        }
       //如果没有return，则证明输入的内容，需要做后续处理
       row.attr_vals.push(row.inputValue.trim())
       row.inputValue=''
       row.inputVisible=false
       //需要发起请求，保存这次操作
      this.saveAttrVals(row)
      },
      //将对 attr_vals的操作，保存到数据库
    async saveAttrVals(row){
         //需要发起请求，保存这次操作
       const {data:res}=await this.$http.put
      (`categories/${this.cateId}/attributes/${row.attr_id}`,
      {
        attr_name:row.attr_name,
        attr_sel:row.attr_sel,
        attr_vals:row.attr_vals.join(' ')
      })
        if(res.meta.status!==200){
          return this.$message.eroor('修改参数失败！')
        }
        this.$message.success('修改参数成功！')
      },
      //点击按钮，展示文本输入框
      showInput(row){
        row.inputVisible=true
        //让文本框自动获得焦点
        //￥nextTick 方法的作用，就是当页面上的元素被重新渲染之后。才会执行回调函数中的
        //代码
        this.$nextTick(_ => {
          this.$refs.saveTagInput.$refs.input.focus();
        });
      },
      //删除对应的参数可选项
      handleClose(i,row){
        row.attr_vals.splice(i,1)
        this.saveAttrVals(row)
      }
  },
  computed: {
    //如果按钮需要被禁用，则返回true，否则返回false
    isBtnDisabled() {
      if (this.selectedCateKeys.length !== 3) {
        return true
      }
      return false
    },
    //当前选中的三级分类的Id
    cateId() {
      if (this.selectedCateKeys.length === 3) {
        return this.selectedCateKeys[2]
      }
      return null
    },
    //动态计算标题的文本
    titleText() {
      if (this.activeName === 'many') {
        return '动态参数'
      }
      return '静态属性'
    }
  }
}
</script>

<style lang="less" scoped>
.cat_opt {
  margin: 15px 0;
}
.input-new-tag{
  width: 120px;
}
.el-tag--light{
  margin: 0 5px;
}
</style>